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I am playing with mods and some times this error appears

Description: Ticking entity

java.lang.NullPointerException: Ticking entity
at net.minecraft.server.management.ServerConfigurationManager.func_82448_a(ServerConfigurationManager.java:522)
at net.minecraft.entity.Entity.func_71027_c(Entity.java:2055)
at net.minecraft.entity.Entity.func_70030_z(Entity.java:363)
at net.minecraft.entity.EntityLivingBase.func_70030_z(EntityLivingBase.java:193)
at net.minecraft.entity.EntityLiving.func_70030_z(EntityLiving.java:157)
at net.minecraft.entity.Entity.func_70071_h_(Entity.java:318)
at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:1561)
at net.minecraft.entity.EntityLiving.func_70071_h_(EntityLiving.java:206)
at net.minecraft.entity.monster.EntityMob.func_70071_h_(SourceFile:30)
at net.minecraft.entity.monster.EntityZombie.func_70071_h_(EntityZombie.java:303)
at net.minecraft.world.World.func_72866_a(World.java:2070)
at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:648)
at net.minecraft.world.World.func_72870_g(World.java:2034)
at net.minecraft.world.World.func_72939_s(World.java:1887)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:489)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:636)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:111)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at net.minecraft.server.management.ServerConfigurationManager.func_82448_a(ServerConfigurationManager.java:522)
at net.minecraft.entity.Entity.func_71027_c(Entity.java:2055)
at net.minecraft.entity.Entity.func_70030_z(Entity.java:363)
at net.minecraft.entity.EntityLivingBase.func_70030_z(EntityLivingBase.java:193)
at net.minecraft.entity.EntityLiving.func_70030_z(EntityLiving.java:157)
at net.minecraft.entity.Entity.func_70071_h_(Entity.java:318)
at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:1561)
at net.minecraft.entity.EntityLiving.func_70071_h_(EntityLiving.java:206)
at net.minecraft.entity.monster.EntityMob.func_70071_h_(SourceFile:30)
at net.minecraft.entity.monster.EntityZombie.func_70071_h_(EntityZombie.java:303)
at net.minecraft.world.World.func_72866_a(World.java:2070)
at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:648)
at net.minecraft.world.World.func_72870_g(World.java:2034)

-- Entity being ticked --
Details:
Entity Type: SpecialMobs.SpecialZombie (toast.specialMobs.entity.zombie.Entity_SpecialZombie)
Entity ID: 11242
Entity Name: Zombie
Entity's Exact location: -329,60, 86,00, -1119,29
Entity's Block location: World: (-330,86,-1120), Chunk: (at 6,5,0 in -21,-70; contains blocks -336,0,-1120 to -321,255,-1105), Region: (-1,-3; contains chunks -32,-96 to -1,-65, blocks -512,0,-1536 to -1,255,-1025)
Entity's Momentum: 0,00, -0,08, 0,06
Stacktrace:
at net.minecraft.world.World.func_72939_s(World.java:1887)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:489)

-- Affected level --
Details:
Level name: Jamou Normal
All players: 1 total; [EntityPlayerMP['Jamou'/118, l='Jamou Normal', x=-333,07, y=72,00, z=-1100,72]]
Chunk stats: ServerChunkCache: 585 Drop: 0
Level seed: 722119853713526539
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: World: (271,64,-353), Chunk: (at 15,4,15 in 16,-23; contains blocks 256,0,-368 to 271,255,-353), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Level time: 610339 game time, 926709 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 52398 (now: false), thunder time: 67582 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:636)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:111)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 184706936 bytes (176 MB) / 523501568 bytes (499 MB) up to 523501568 bytes (499 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
FML: MCP v9.05 FML v7.10.140.1401 Minecraft Forge 10.13.3.1401 35 mods loaded, 35 mods active
mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{7.10.140.1401} [Forge Mod Loader] (forge-1.7.10-10.13.3.1401-1710ls.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{10.13.3.1401} [Minecraft Forge] (forge-1.7.10-10.13.3.1401-1710ls.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
CodeChickenCore{1.0.1.8} [CodeChicken Core] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
NotEnoughItems{1.0.2.15} [Not Enough Items] (NotEnoughItems-1.7.10-1.0.2.15-universal.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
sapmanpack{2.4.1} [SanAndreasPs Manager Pack CORE edition] (SAPManPack-1.7.10-2.4.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
lucky{5.1.0} [Lucky Block] ([1-7-10]_Lucky_Block_v5-1-0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DamageIndicatorsMod{3.2.0} [Damage Indicators] ([1.7.10]DamageIndicatorsMod-3.2.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
bspkrsCore{6.13} [bspkrsCore] ([1.7.10]bspkrsCore-universal-6.13.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Treecapitator{1.7.2} [Treecapitator] ([1.7.2]Treecapitator-universal-2.0.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
atum{0.6} [Atum] (Atum-1.7.10-0.6.23.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Backpack{2.0.0} [Backpack] (backpack-2.0.0-1.7.x.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
BiblioCraft{1.9.2} [BiblioCraft] (BiblioCraft[v1.9.2][MC1.7.10].jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
kegare.caveworld{1.8.3} [Caveworld] (Caveworld_1.7.10-v1.8.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
chocolateQuest{1.0} [Chocolate Quest] (chocolateQuest-1.7.10-1.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
diversity{ALPHA 1.5} [Diversity] (Diversity-1.7.10-Alpha-1.5.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
dungeonpack{1.7.10-1.0} [Dungeon Pack] (dungeonpack-1.7.10-1.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
eplus{3.0.2-d} [Enchanting Plus] (EnchantingPlus-1.7.10-3.0.2-d.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
eternalfrost{2.0b2} [Eternal Frost] (eternalfrost-2.0b2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
ether{3.0} [ether] (ether-1.7.10-0.7.13.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
rftl{1.7.10} [Rotten Flesh to Leather] (Forge SSP SMP - Rotten Flesh 1.7.2 1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
ganysnether{1.7.2} [Gany's Nether] (Ganys-Nether-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
inventorytweaks{1.57-116} [Inventory Tweaks] (InventoryTweaks-1.57-116.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Mantle{1.7.10-0.3.2.jenkins184} [Mantle] (Mantle-1.7.10-0.3.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
MapWriter{2.1.2} [MapWriter] (MapWriter-1.7.10-2.1.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
quiverchevsky{b57} [QuiverBow] (QuiverBow_1.7.2_b57.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
AS_Ruins{14.7} [Ruins Spawning System] (Ruins-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
RWG{Alpha 1.3.2} [Realistic World Gen Alpha] (RWG-alpha-1.3.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
SpecialMobs{3.0.3} [Special Mobs] (SpecialMobs-1.7.10-3.0.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
TConstruct{1.7.10-1.7.1.build771} [Tinkers' Construct] (TConstruct-1.7.10-1.7.1c.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
corerm{1.0b} [RikMuld's Core] (TheCampingMod_2.1f.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
camping{2.1f} [The Camping Mod 2] (TheCampingMod_2.1f.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
erebus{0.2a} [Erebus] (TheErebus-0.2a.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
TwilightForest{2.3.5} [The Twilight Forest] (twilightforest-1.7.10-2.3.5.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
weaponmod{1.7.2 v1.14.2} [Balkon's WeaponMod] (weaponmod-1.14.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
GL info: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
Mantle Environment: Environment healthy.
TConstruct Environment: Environment healthy.
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 1 / 8; [EntityPlayerMP['Jamou'/118, l='Jamou Normal', x=-333,07, y=72,00, z=-1100,72]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'

HELP ME